Pro Ears are the only electronic hearing protectors with DLSC technology. This technology compresses the impulse sound to a safer level, as opposed to shutting down the system. While compressing the impulse sound wave the system also amplifies the lower level sounds such as voice allowing for continuous operation. A person wearing Pro Ears will remain aware of their environment, hearing range commands or other verbal instructions as they were intended. We believe this provides for a safer, more enjoyable experience.